Unanswered: Not able to focus on the suggestion box

Unanswered: Not able to focus on the suggestion box

Since we are using 2.2.4 Gxt version to developing web application. We have a requirement to automatically focus on suggestion box which is placed on top of Dialog box (popup box). I tried below code to implement but it is not working as expected. Could you please help me. Thanks in Advance.

final DialogBox orderForDialog = new DialogBox();
final FlexTable orderForTable = new FlexTable();
final FlexTable cnfrmAndCancelFlexTable = new FlexTable();